Elastic fluid turbine



June 28, 1932. O, JUNGGREN 1,865,257

ELASTIC FLUID TURBINE Filed April 12, 1928 Inventor: Oscar Junggr'em y m HLs Attorney.

Patented June 28, 1932 UNITED STATES IPATE NT OFFICE OSCAR J'UNGGREN, OF SCHENECTAIDY, NEW 'YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK ELASTIC FLUID TURBINE Application filed April 12, 1928. Serial No. 269,449.

In the case of large turbines where for any reason it becomes desirable not tobuild the entire machine into a single casing, it is known to build the turbine in two or more sections having separate casings. For example, such a turbine may comprise a high pressure section and one or more low pressure sections, the high pressure section being connected in series with the low pressure section or sections as regards the flow of elastic fluid, and each section driving its own generator. Such arrangements are quite satisfactory,

. but are open to the object1on that they occurected to the following py an increased amount of floor space, a consideration, which in some ter of great importance.

; The obJect of my invention is to provide an improved construction and arrangement in a turbine comprising a high pressure section and one or more low pressure, sections driving separate generators or other driven machines which is very economical in floor space and permits large tively high speed.

For a consideration of what I believe to be novel and my invention,attention is didescription and the claims appended thereto.

In the drawing Fig. l is a side elevation of a structure embodying my invention, and Fig. 2 is an end view thereof.

, According to one embodiment of my invention, I mount the low pressure turbine section and the machine driven thereby on a suitable bed plate in the usual manner, and I then mount the high pressure turbine sec- 1 tion and its'driven machine directly on top of the low pressure turbine section and its' driven machine. Preferablythe arrangement is such that the exhaust'end of the high pressure section stands directly adjacent to the admission. opening of the low pressure section so that the connection for conveying the tings as is found to be desirable.

exhaust elastic fluid from the high pressure section to the low pressure section may be, comparatively short. .Th6generators may be housed in a single casing or in separate cas- Preferably, however, I house themin a singlecasing, the

' two generators instances is a matinvention. 7 indicates the shaft of the low powers at comparathus becoming, in a way, a unitary machine or structure.

Referring to the drawing, 1 indicates a low pressure turbine section, the casing of which is provided with feet 2,'by means of which it is supported on its foundation. In the present instance, a turbine structure of the double flow t pe is illustrated, the steam entering an admission opening 3 and flowing in opposite directions through righthand and lefthand sections 4 and 5 to the exhaust opening 6. The exhaust, opening 6 will be connected to acondenser in the usualmanner. The condenser is not illustrated in the drawing as it forms no part of the present pressure turbine section and 8 indicates a genera-tor rotor driven thereby. The low pressure turbine section is illustrated only in outline as its specific construction forms no partof the present invention. It may be a suitable turbine of either the impulse or reaction type.

9 indicates a high pressure turbinesection mounted directly over low pressure turbine section 1 and supported directly thereon. At its low pressure end, high pressure turbine section 9 is supported by a bearing pedestal 10 which rests on the upper ends of supports 10 formedintegral with the upper half of the casing of turbine section 1. At its high pressure end turbine section 9 is supported by a bearing pedestal 11 which rests on the upper ends of supports 11* carried by projecting feet or supports 12 which form a part ofthe Supports 11 casing for turbine section '1. extend up on each sideof shaft 7 and are tied together and made rigid by means of suitable cross-braces 13. The exhaust end of high pressure turbine section over admission opening 3 and is connected to itby a suitable connection 14 of a character such as to permit relative expansion and contraction in a vertical direction. 15 and 16 indicate conduits through which high pressure elastic fluid is supplied to the high pressure turbine section 9. They are located one on each side of the high pressure turbine section and communicate with valve chests 17 and 18containing valves of any suitable type,

9 is located directly for example such as that shown in the patent to Dryer 1,471,316, dated October 16, 1928, to control the admission of elastic fluid to the turbine. In the present instance a known type is illustrated,'the same being opened and closed by suitable cams oncani-shafts 19 and 20 connected :by gearing to a cross-bar 21 which is turned in the usual way through a .rackand gear 22 operated by means of a servo motor 23. In the outline, 24; indicates the governor for the turbine sections. The valve gear may be operated from it in any suitable manner. The details of the valve actuating means is not illustrated as it iiorms no part of the present invention. Valve chests l7 and '18 :are preferably supported by XIIIBZIDS'OI suitable spring supports '25. This arrange- :ment serves to leave the valve chest to expand and contract.

"I hebearings at the turbine end of thegeneratorsare shown as being carried by pedestals 26 which in turn are supported from flanges 127 formed integral with .the .casing of turbinesection 1. The bearings at itheother end of the generators :are CiUIliQCl by pedestals 28 which may be supported from a bed plate in any suitable manner. 29 indicates the rotor of the generator driven by high pressure turbine section 19 and 30 indicates the shaft of turbine section19. The field work-of the generators maybe builtzas a unitary field structure, and housed in :a single housing :31. This serves to :give a rigid generatorstructure and one economical to build.

\Yith'the foregoing arrangement, it will be :seen "that I provide a turbine structure comprising :a high pressure section and a low pressure section which occupies a minimum amount of tloor space and one wherein the high pressure section discharges elastic 'fiuid direotlry to the' low pressureseotion through a 'very sihor t conduit. Thislatteriso'f substantial importance :in that it avoids the use of ilarge piping between the two units.

In accordance with the provisions of :the patent statues I have described the principle of operation of my invention together with ithe apparatus which I now-consider to represent the best enrbodiment thereof flout I desire to have .it understood that the apparatus ishown is only illustrative and tha t the invention may be carried out by other means.

What I claim as new and desire to sepcure by Letters Pa'tent of the United Fita tes 1s:

"1. In combination, a double flow -low pressure :turbine section having a centre-l ly located inlet-opening,supporting feet-carried by the casing of said low pressure section, vertically extending members 0 arried by said supporting feet, and a high pressure turbine section-mounted on said vertically extending members and having its'eir'haust operiing connected-to the inlet opening of the lowpressure turbineisection.

2. In a unitary structure, a low pressure set comprising a low pressure turbine having a horizontal shaft and a driven machine in axial alignment with and driven by the low pressure turbine, the casing of said low pressure turbine being provided with supporting means at its two ends, and a high pressure set comprising a high pressure turbine having a horizontal shaft and a driven machine "in axial alignment with and driven "by the high pressure turbine, said high pressure turbine being mounted on said supporting means directly above the low pressure turbine :and said second named driven machine being mounted above and supported on the first :named driven machine.

3. In combination, a double flow low pres sure turbine having a downwardly facing-ex- 'haust opening and a centrally located inlet opening, supporting means carried by the casing of the low pressure turbine at its two ends. and a high pressure turbine mounted directly above the low pressure turbine on said supporting means.

4-. In combination, a low pressure turbine section having 'an inlet opening, supporting feet carried by the casing-of saidlow pressure section, vertically extending members carried by said supporting feet andahigh pressure turbine section mounted 'on said vertically extending members and having its exhaust opening connected to the inlet opening of the low pressure turbine section.

5. Incombination, a-double flow low pressure turbine having an exhaust opening :and a centrally located inlet "opening, supporting means carried by the casing of the low pressure turbine at 'its'two ends, and ahigh pressure turbine mounted directly above the low pressure turbine on said supporting means."

6. In combination, a low pressure turbine having an exhaust opening and an inlet opening, feet carried by-t he casingo-f the low pressure turbine for-supporting it-on a foundation, supporting means carried by the casing of the low pressure turbine at its two ends, and a high pressure turbine mounted directly above the low pressure turbine with its bearings supported on said supporting means.

7 In combination, a low pressure :turbine section having a casing, -supporting feet carried by the forward endof said casing and forming "a part thereof, a high pressure turbine section which is mounted above the low pressure turbine section and exhausts into it, a vertically disposed structure which is sup ported at its lower ends by said .feet and supports one bearing of said high pressure turbine section, and meanssupported by and forming a part of the low pressure turbine casing for supporting the other bearing of the high :pressure turbine section.

8. In combination, a low pressure turbine section having a casing, supporting feet carried by the forward end of said casing and forming a part thereof, a high pressure turbine section which is mounted above the low pressure turbine section and exhausts into it, a structure comprising vertically disposed members which are supported at their ends by said feet and a transversely extending member which connects said vertically disposed members for supporting one bearing w of said high pressure turbine section, and

means carried by the casing of the low pressure turbine section for supporting the other bearing of the high pressure turbinesection.

9. In combination, a double flow low pres- 15 sure turbine having an exhaust opening and a centrally located inlet opening, supporting means carried bythe casing of the low pressure turbine at its two ends, a high pressure turbine mounted directly above the low pressure turbine on said supporting means, a driven machine for the low pressure turbine, and a driven machine for the high pressure turbine supported on the first named driven machine. 26 In witness whereof I have hereunto set my hand this 11th day of April, 1928.

OSCAR J UN GGREN. 

